Modified lamp beads.
The lamp bead contains a lens, and the back side of the aluminum substrate contains a heat-conductive double-sided tape
Any size can be connected to 3-15 LEDs. No longer subject to particle spacing, hole limitation.
Welding method:
1. Place the LED lamp beads in the order of positive and negative electrodes, scrape the paint on the front and rear insulation layers, and expose the copper skin.
2, connected end to end, the former positive pole, connected to the next negative pole in turn, welding line, connected in series; can also be connected in parallel, according to your required voltage connection,get soldering done.
If you need 3V one,please click below link:
https://www.ebay.com/itm/223532750424?nordt=true